./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy9_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy9_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 904ada5b631ac9ba69e93f7c5eb51a71b3a5f4ed245a1ea57aa3fec5e9b98c37 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:12:58,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:12:58,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:12:58,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:12:58,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:12:58,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:12:58,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:12:58,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:12:58,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:12:58,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:12:58,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:12:58,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:12:58,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:12:58,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:12:58,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:12:58,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:12:58,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:12:58,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:12:58,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:12:58,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:12:58,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:12:58,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:12:58,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:12:58,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:12:58,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:12:58,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:12:58,529 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:12:58,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:12:58,531 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:12:58,532 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:12:58,532 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:12:58,533 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:12:58,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:12:58,534 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:12:58,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:12:58,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:12:58,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:12:58,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:12:58,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:12:58,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:12:58,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:12:58,548 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:12:58,578 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:12:58,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:12:58,582 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:12:58,582 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:12:58,583 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:12:58,583 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:12:58,583 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:12:58,584 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:12:58,584 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:12:58,584 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:12:58,585 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:12:58,585 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:12:58,585 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:12:58,586 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:12:58,586 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:12:58,586 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:12:58,586 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:12:58,586 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:12:58,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:12:58,587 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:12:58,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:12:58,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:12:58,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:12:58,589 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:12:58,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:12:58,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:12:58,590 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:12:58,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:12:58,590 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:12:58,590 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:12:58,590 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:12:58,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:12:58,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:12:58,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:12:58,591 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:12:58,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:12:58,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:12:58,592 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:12:58,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:12:58,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:12:58,592 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:12:58,593 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 904ada5b631ac9ba69e93f7c5eb51a71b3a5f4ed245a1ea57aa3fec5e9b98c37 [2022-11-19 07:12:58,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:12:58,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:12:58,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:12:58,910 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:12:58,911 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:12:58,912 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-examples/standard_copy9_ground-1.i [2022-11-19 07:12:58,986 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/data/c03be8f7e/3fd9b5397cfa42babefcb796d03c3c7c/FLAG2c59cf6d1 [2022-11-19 07:12:59,518 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:12:59,518 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/sv-benchmarks/c/array-examples/standard_copy9_ground-1.i [2022-11-19 07:12:59,526 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/data/c03be8f7e/3fd9b5397cfa42babefcb796d03c3c7c/FLAG2c59cf6d1 [2022-11-19 07:12:59,885 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/data/c03be8f7e/3fd9b5397cfa42babefcb796d03c3c7c [2022-11-19 07:12:59,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:12:59,894 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:12:59,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:12:59,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:12:59,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:12:59,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:12:59" (1/1) ... [2022-11-19 07:12:59,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f909474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:59, skipping insertion in model container [2022-11-19 07:12:59,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:12:59" (1/1) ... [2022-11-19 07:12:59,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:12:59,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:13:00,141 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/sv-benchmarks/c/array-examples/standard_copy9_ground-1.i[816,829] [2022-11-19 07:13:00,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:13:00,200 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:13:00,217 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/sv-benchmarks/c/array-examples/standard_copy9_ground-1.i[816,829] [2022-11-19 07:13:00,247 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:13:00,263 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:13:00,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:00 WrapperNode [2022-11-19 07:13:00,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:13:00,265 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:13:00,265 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:13:00,265 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:13:00,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:00" (1/1) ... [2022-11-19 07:13:00,290 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:00" (1/1) ... [2022-11-19 07:13:00,326 INFO L138 Inliner]: procedures = 16, calls = 59, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 195 [2022-11-19 07:13:00,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:13:00,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:13:00,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:13:00,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:13:00,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:00" (1/1) ... [2022-11-19 07:13:00,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:00" (1/1) ... [2022-11-19 07:13:00,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:00" (1/1) ... [2022-11-19 07:13:00,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:00" (1/1) ... [2022-11-19 07:13:00,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:00" (1/1) ... [2022-11-19 07:13:00,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:00" (1/1) ... [2022-11-19 07:13:00,377 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:00" (1/1) ... [2022-11-19 07:13:00,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:00" (1/1) ... [2022-11-19 07:13:00,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:13:00,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:13:00,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:13:00,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:13:00,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:00" (1/1) ... [2022-11-19 07:13:00,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:13:00,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:00,413 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:13:00,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:13:00,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:13:00,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:13:00,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:13:00,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:13:00,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:13:00,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:13:00,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:13:00,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:13:00,569 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:13:00,571 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:13:00,882 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:13:00,997 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:13:00,997 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-19 07:13:00,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:13:00 BoogieIcfgContainer [2022-11-19 07:13:01,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:13:01,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:13:01,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:13:01,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:13:01,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:12:59" (1/3) ... [2022-11-19 07:13:01,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e2afde6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:13:01, skipping insertion in model container [2022-11-19 07:13:01,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:00" (2/3) ... [2022-11-19 07:13:01,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e2afde6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:13:01, skipping insertion in model container [2022-11-19 07:13:01,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:13:00" (3/3) ... [2022-11-19 07:13:01,009 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-1.i [2022-11-19 07:13:01,029 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:13:01,029 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:13:01,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:13:01,088 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3f42ed6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:13:01,088 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:13:01,092 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:01,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:13:01,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:01,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:01,101 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:01,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:01,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1505914239, now seen corresponding path program 1 times [2022-11-19 07:13:01,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:01,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338810768] [2022-11-19 07:13:01,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:01,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:01,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:01,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338810768] [2022-11-19 07:13:01,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338810768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:01,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:01,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:13:01,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716728472] [2022-11-19 07:13:01,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:01,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:13:01,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:01,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:13:01,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:13:01,650 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:01,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:01,743 INFO L93 Difference]: Finished difference Result 33 states and 55 transitions. [2022-11-19 07:13:01,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:13:01,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 07:13:01,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:01,754 INFO L225 Difference]: With dead ends: 33 [2022-11-19 07:13:01,754 INFO L226 Difference]: Without dead ends: 17 [2022-11-19 07:13:01,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:13:01,760 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:01,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:13:01,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-19 07:13:01,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-19 07:13:01,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:01,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2022-11-19 07:13:01,794 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 14 [2022-11-19 07:13:01,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:01,795 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2022-11-19 07:13:01,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:01,795 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2022-11-19 07:13:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:13:01,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:01,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:01,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:13:01,797 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:01,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:01,798 INFO L85 PathProgramCache]: Analyzing trace with hash 80859531, now seen corresponding path program 1 times [2022-11-19 07:13:01,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:01,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800859136] [2022-11-19 07:13:01,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:01,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:01,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:01,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800859136] [2022-11-19 07:13:01,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800859136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:01,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400551040] [2022-11-19 07:13:01,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:01,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:01,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:02,004 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:02,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:13:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:02,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:13:02,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:13:02,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:02,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400551040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:02,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:13:02,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 07:13:02,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392039567] [2022-11-19 07:13:02,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:02,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:13:02,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:02,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:13:02,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:13:02,228 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:02,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:02,303 INFO L93 Difference]: Finished difference Result 39 states and 66 transitions. [2022-11-19 07:13:02,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:13:02,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-19 07:13:02,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:02,305 INFO L225 Difference]: With dead ends: 39 [2022-11-19 07:13:02,305 INFO L226 Difference]: Without dead ends: 26 [2022-11-19 07:13:02,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:13:02,307 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:02,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:13:02,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-19 07:13:02,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-19 07:13:02,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:02,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-11-19 07:13:02,314 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 15 [2022-11-19 07:13:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:02,315 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-11-19 07:13:02,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:02,315 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-11-19 07:13:02,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 07:13:02,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:02,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:02,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:02,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:02,523 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:02,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:02,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1229820764, now seen corresponding path program 1 times [2022-11-19 07:13:02,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:02,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707929086] [2022-11-19 07:13:02,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:02,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:13:02,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:02,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707929086] [2022-11-19 07:13:02,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707929086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:02,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359770034] [2022-11-19 07:13:02,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:02,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:02,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:02,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:02,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:13:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:02,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:13:02,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:13:02,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:13:02,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359770034] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:02,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1183681713] [2022-11-19 07:13:02,945 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:13:02,945 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:13:02,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:13:02,955 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:13:02,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:13:03,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:03,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:03,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:03,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:03,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:03,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:03,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:03,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:03,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:03,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:04,100 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-19 07:13:04,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-19 07:13:04,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:04,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:04,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:04,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:04,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:04,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:04,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:04,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:04,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:04,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:05,526 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-19 07:13:05,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-19 07:13:05,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:05,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:05,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:13:06,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:06,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:06,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:06,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:06,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:07,051 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:13:07,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 1020 treesize of output 1010 [2022-11-19 07:13:09,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:09,869 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:13:09,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:13:09,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:09,920 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:09,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:09,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:09,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:09,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:10,009 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:10,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:10,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:10,105 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:10,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:10,168 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:10,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:10,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:10,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:10,273 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:13:10,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:13:10,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:10,379 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:10,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:10,425 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:10,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:10,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:10,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:10,532 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:13:10,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:13:10,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:10,619 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:10,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:10,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:10,658 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:10,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:10,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:10,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:10,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:10,731 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:10,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:10,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:10,805 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:10,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:10,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:10,844 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:10,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:10,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:10,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:10,913 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:10,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:10,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:11,008 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:11,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:11,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:11,048 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:11,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:11,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:11,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:11,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:11,123 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:11,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:11,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:11,221 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:11,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:11,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:11,294 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:11,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:11,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:11,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:11,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:11,371 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:11,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:11,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:11,446 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:11,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:11,479 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:11,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:11,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:11,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:11,635 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:13:11,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-19 07:13:11,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:11,808 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:11,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:11,845 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:11,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:11,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:11,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:11,936 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:13:11,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:13:12,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:12,021 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:12,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:12,046 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:13:12,562 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '415#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:13:12,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:13:12,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:13:12,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-19 07:13:12,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856077106] [2022-11-19 07:13:12,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:13:12,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:13:12,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:12,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:13:12,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:13:12,565 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:12,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:12,672 INFO L93 Difference]: Finished difference Result 52 states and 74 transitions. [2022-11-19 07:13:12,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:13:12,672 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-19 07:13:12,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:12,673 INFO L225 Difference]: With dead ends: 52 [2022-11-19 07:13:12,673 INFO L226 Difference]: Without dead ends: 29 [2022-11-19 07:13:12,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:13:12,675 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:12,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:13:12,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-19 07:13:12,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-19 07:13:12,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-11-19 07:13:12,680 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2022-11-19 07:13:12,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:12,681 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-11-19 07:13:12,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:12,681 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-11-19 07:13:12,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 07:13:12,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:12,682 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:12,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:12,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:12,894 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:12,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:12,894 INFO L85 PathProgramCache]: Analyzing trace with hash -911678298, now seen corresponding path program 2 times [2022-11-19 07:13:12,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:12,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328949041] [2022-11-19 07:13:12,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:12,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:13:13,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:13,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328949041] [2022-11-19 07:13:13,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328949041] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:13,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784096454] [2022-11-19 07:13:13,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:13:13,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:13,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:13,056 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:13,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:13:13,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:13:13,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:13:13,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:13:13,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:13:13,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:13:13,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784096454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:13,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1848970939] [2022-11-19 07:13:13,272 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:13:13,272 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:13:13,273 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:13:13,273 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:13:13,273 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:13:13,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:13,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:13,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:13,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:13,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:13,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:13,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:13,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:13,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:13,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:14,038 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-19 07:13:14,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-19 07:13:14,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:14,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:14,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:14,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:14,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:14,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:14,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:14,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:14,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:14,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:15,216 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-19 07:13:15,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-19 07:13:15,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:15,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:15,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:13:15,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:15,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:15,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:15,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:15,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:15,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:15,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:15,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:15,968 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:13:15,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 1040 treesize of output 1008 [2022-11-19 07:13:16,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:16,373 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:13:16,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:13:16,413 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:16,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:16,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:16,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:16,520 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:13:16,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:13:16,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:16,619 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:16,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:16,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:16,656 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:16,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:16,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:16,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:16,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:16,732 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:16,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:16,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:16,802 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:16,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:16,836 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:16,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:16,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:16,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:16,936 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:13:16,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:13:17,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,023 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:17,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:17,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,058 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:17,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:17,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:17,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,124 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:17,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:17,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,182 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:17,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:17,217 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:17,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:17,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,311 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:13:17,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:13:17,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,406 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:17,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:17,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,437 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:17,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:17,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:17,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,507 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:17,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:17,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,600 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:17,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:17,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,666 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:17,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:17,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:17,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,728 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:17,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:17,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,795 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:17,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:17,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,826 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:17,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:17,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:17,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,896 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:17,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:17,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:17,975 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:17,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:18,037 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:18,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:18,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:18,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:18,146 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:13:18,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-19 07:13:18,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:18,245 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:18,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:18,270 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:13:18,721 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '731#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:13:18,721 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:13:18,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:13:18,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-19 07:13:18,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112371623] [2022-11-19 07:13:18,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:13:18,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:13:18,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:18,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:13:18,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:13:18,723 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:18,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:18,891 INFO L93 Difference]: Finished difference Result 77 states and 122 transitions. [2022-11-19 07:13:18,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:13:18,892 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-19 07:13:18,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:18,893 INFO L225 Difference]: With dead ends: 77 [2022-11-19 07:13:18,893 INFO L226 Difference]: Without dead ends: 56 [2022-11-19 07:13:18,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:13:18,894 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:18,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:13:18,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-19 07:13:18,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-19 07:13:18,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:18,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-11-19 07:13:18,902 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 27 [2022-11-19 07:13:18,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:18,902 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-11-19 07:13:18,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:18,903 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-11-19 07:13:18,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 07:13:18,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:18,904 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:18,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:19,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:19,110 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:19,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:19,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2146685505, now seen corresponding path program 3 times [2022-11-19 07:13:19,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:19,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016529292] [2022-11-19 07:13:19,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:19,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:13:19,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:19,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016529292] [2022-11-19 07:13:19,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016529292] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:19,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369916920] [2022-11-19 07:13:19,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:13:19,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:19,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:19,389 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:19,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:13:19,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:13:19,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:13:19,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:13:19,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:13:19,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:13:19,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369916920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:19,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1673270820] [2022-11-19 07:13:19,664 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:13:19,664 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:13:19,665 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:13:19,665 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:13:19,665 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:13:19,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:19,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:19,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:19,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:19,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:19,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:19,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:19,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:19,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:19,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:20,435 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-19 07:13:20,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-19 07:13:20,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:20,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:20,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:20,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:20,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:20,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:20,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:20,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:20,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:20,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:21,508 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-19 07:13:21,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-19 07:13:21,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:21,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:21,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:13:22,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:22,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:22,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:22,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:22,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:22,213 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:13:22,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 1020 treesize of output 1010 [2022-11-19 07:13:24,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:24,120 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:13:24,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:13:24,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:24,167 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:24,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:24,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:24,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:24,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:24,226 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:24,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:24,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:24,321 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:24,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:24,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:24,380 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:24,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:24,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:24,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:24,445 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:24,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:24,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:24,507 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:24,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:24,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:24,541 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:24,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:24,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:24,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:24,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:24,606 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:24,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:24,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:24,698 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:24,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:24,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:24,758 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:24,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:24,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:24,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:24,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:24,823 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:24,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:24,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:24,903 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:24,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:24,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:24,947 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:24,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:25,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:25,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:25,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:25,030 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:25,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:25,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:25,112 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:25,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:25,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:25,148 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:25,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:25,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:25,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:25,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:25,221 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:25,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:25,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:25,298 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:25,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:25,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:25,357 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:25,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:25,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:25,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:25,424 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:25,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:25,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:25,496 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:25,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:25,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:25,531 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:25,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:25,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:25,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:25,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:25,596 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:25,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:25,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:25,686 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:25,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:25,747 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:25,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:25,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:25,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:25,845 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:13:25,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:13:25,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:25,919 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:25,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:25,939 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:13:26,430 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1319#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:13:26,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:13:26,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:13:26,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-19 07:13:26,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389378371] [2022-11-19 07:13:26,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:13:26,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:13:26,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:26,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:13:26,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:13:26,432 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:26,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:26,507 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2022-11-19 07:13:26,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:13:26,507 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-19 07:13:26,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:26,508 INFO L225 Difference]: With dead ends: 112 [2022-11-19 07:13:26,508 INFO L226 Difference]: Without dead ends: 62 [2022-11-19 07:13:26,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:13:26,509 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:26,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:13:26,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-19 07:13:26,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-19 07:13:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:26,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-11-19 07:13:26,516 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 54 [2022-11-19 07:13:26,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:26,517 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-11-19 07:13:26,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:26,517 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-11-19 07:13:26,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 07:13:26,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:26,519 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:26,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:26,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:26,725 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:26,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:26,726 INFO L85 PathProgramCache]: Analyzing trace with hash -789133823, now seen corresponding path program 4 times [2022-11-19 07:13:26,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:26,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873785256] [2022-11-19 07:13:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:26,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:13:27,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:27,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873785256] [2022-11-19 07:13:27,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873785256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:27,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995707560] [2022-11-19 07:13:27,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:13:27,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:27,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:27,246 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:27,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:13:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:27,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:13:27,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:13:27,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:13:27,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995707560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:27,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [8179207] [2022-11-19 07:13:27,735 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:13:27,735 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:13:27,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:13:27,736 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:13:27,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:13:27,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:27,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,816 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-19 07:13:28,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-19 07:13:28,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:28,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 76 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 67 [2022-11-19 07:13:29,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:29,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:29,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:13:29,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:29,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:29,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:29,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:29,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:29,652 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:13:29,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 1020 treesize of output 1010 [2022-11-19 07:13:31,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:31,549 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:13:31,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:13:31,587 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:31,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:31,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:31,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:31,698 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:13:31,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:13:31,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:31,803 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:31,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:31,836 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:31,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:31,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:31,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:31,949 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:13:31,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:13:32,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:32,048 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:32,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:32,083 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:32,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:32,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:32,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:32,198 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:13:32,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:13:32,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:32,285 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:32,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:32,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:32,316 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:32,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:32,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:32,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:32,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:32,378 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:32,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:32,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:32,439 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:32,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:32,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:32,472 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:32,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:32,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:32,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:32,527 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:32,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:32,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:32,601 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:32,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:32,648 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:32,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:32,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:32,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:32,743 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:13:32,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:13:32,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:32,882 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:32,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:32,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:32,924 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:32,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:32,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:32,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:32,987 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:32,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:33,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:33,049 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:33,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:33,082 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:33,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:33,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:33,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:33,185 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:13:33,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-19 07:13:33,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:33,261 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:33,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:33,293 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:33,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:33,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:33,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:33,414 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:13:33,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-19 07:13:33,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:33,502 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:33,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:33,526 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:13:33,936 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2037#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:13:33,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:13:33,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:13:33,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-19 07:13:33,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967148536] [2022-11-19 07:13:33,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:13:33,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 07:13:33,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:33,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 07:13:33,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:13:33,939 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:34,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:34,067 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2022-11-19 07:13:34,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 07:13:34,068 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-19 07:13:34,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:34,069 INFO L225 Difference]: With dead ends: 124 [2022-11-19 07:13:34,069 INFO L226 Difference]: Without dead ends: 74 [2022-11-19 07:13:34,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:13:34,071 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:34,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:13:34,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-19 07:13:34,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-19 07:13:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 73 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:34,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2022-11-19 07:13:34,080 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 60 [2022-11-19 07:13:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:34,080 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2022-11-19 07:13:34,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:34,080 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2022-11-19 07:13:34,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 07:13:34,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:34,082 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:34,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:34,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 07:13:34,288 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:34,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:34,288 INFO L85 PathProgramCache]: Analyzing trace with hash 785857921, now seen corresponding path program 5 times [2022-11-19 07:13:34,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:34,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928067040] [2022-11-19 07:13:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:34,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-19 07:13:35,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:35,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928067040] [2022-11-19 07:13:35,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928067040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:35,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073968253] [2022-11-19 07:13:35,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:13:35,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:35,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:35,272 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:35,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:13:35,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:13:35,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:13:35,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:13:35,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-19 07:13:36,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-19 07:13:36,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073968253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:36,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [352860159] [2022-11-19 07:13:36,186 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:13:36,186 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:13:36,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:13:36,186 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:13:36,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:13:36,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:36,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:36,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:36,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:36,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:36,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:36,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:36,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:36,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:36,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:36,872 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-19 07:13:36,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-19 07:13:36,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:36,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:36,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:37,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:37,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:37,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:37,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:37,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:37,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:37,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:37,993 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-19 07:13:37,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-19 07:13:38,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:38,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:38,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:13:38,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:38,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:38,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:38,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:38,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:38,708 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:13:38,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 1020 treesize of output 1010 [2022-11-19 07:13:40,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:40,494 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:13:40,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:13:40,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:40,535 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:40,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:40,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:40,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:40,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:40,592 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:40,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:40,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:40,684 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:40,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:40,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:40,741 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:40,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:40,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:40,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:40,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:40,807 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:40,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:40,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:40,872 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:40,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:40,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:40,907 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:40,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:40,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:40,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:40,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:40,976 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:40,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:41,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:41,057 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:41,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:41,106 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:41,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:41,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:41,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:41,193 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:13:41,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:13:41,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:41,262 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:41,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:41,297 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:41,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:41,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:41,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:41,381 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:13:41,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:13:41,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:41,446 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:41,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:41,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:41,480 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:41,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:41,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:41,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:41,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:41,540 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:41,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:41,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:41,616 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:41,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:41,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:41,679 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:41,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:41,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:41,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:41,752 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:41,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:41,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:41,809 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:41,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:41,845 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:41,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:41,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:41,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:41,960 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:13:41,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:13:42,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:42,064 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:42,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:42,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:42,096 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:42,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:42,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:42,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:42,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:42,156 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:42,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:42,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:42,274 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:42,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:42,315 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:13:42,980 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2885#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:13:42,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:13:42,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:13:42,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-19 07:13:42,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984912974] [2022-11-19 07:13:42,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:13:42,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 07:13:42,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:42,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 07:13:42,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 07:13:42,984 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:43,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:43,412 INFO L93 Difference]: Finished difference Result 179 states and 253 transitions. [2022-11-19 07:13:43,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-19 07:13:43,415 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-19 07:13:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:43,420 INFO L225 Difference]: With dead ends: 179 [2022-11-19 07:13:43,420 INFO L226 Difference]: Without dead ends: 129 [2022-11-19 07:13:43,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 07:13:43,423 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:43,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:13:43,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-19 07:13:43,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-11-19 07:13:43,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0859375) internal successors, (139), 128 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:43,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2022-11-19 07:13:43,456 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 72 [2022-11-19 07:13:43,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:43,459 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2022-11-19 07:13:43,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2022-11-19 07:13:43,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 07:13:43,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:43,468 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:43,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:43,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:43,677 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:43,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:43,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1719339115, now seen corresponding path program 6 times [2022-11-19 07:13:43,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:43,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705153420] [2022-11-19 07:13:43,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:43,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-19 07:13:45,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:45,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705153420] [2022-11-19 07:13:45,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705153420] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:45,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288930758] [2022-11-19 07:13:45,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:13:45,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:45,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:45,095 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:45,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:13:45,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:13:45,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:13:45,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 1278 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:13:45,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-19 07:13:45,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-19 07:13:46,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288930758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:46,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1156696953] [2022-11-19 07:13:46,441 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:13:46,441 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:13:46,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:13:46,442 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:13:46,442 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:13:46,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:46,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:46,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:46,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:46,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:46,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:46,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:46,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:46,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:46,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:47,509 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-19 07:13:47,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-19 07:13:47,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:47,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:47,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:47,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:47,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:47,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:47,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:47,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:47,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:47,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:47,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 76 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 67 [2022-11-19 07:13:47,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:47,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:47,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:13:48,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:48,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:48,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:48,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:48,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:48,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:48,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:48,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:48,132 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:13:48,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 1040 treesize of output 1008 [2022-11-19 07:13:48,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:48,443 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:13:48,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:13:48,484 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:48,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:48,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:48,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:48,587 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:13:48,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-19 07:13:48,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:48,665 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:48,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:48,698 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:48,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:48,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:48,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:48,789 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:13:48,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:13:48,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:48,885 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:48,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:48,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:48,921 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:48,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:48,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:48,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:48,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:48,987 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:48,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:49,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,070 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:49,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:49,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,144 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:49,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:49,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:49,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,201 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:49,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:49,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,263 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:49,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:49,294 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:13:49,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:13:49,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,380 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:13:49,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-19 07:13:49,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,465 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:49,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:49,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,498 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:49,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:49,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:49,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,552 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:49,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:49,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,627 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:49,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:49,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,679 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:49,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:49,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:49,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,734 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:49,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:49,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,802 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:49,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:49,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,836 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:49,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:49,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:49,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,896 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:49,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:49,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:49,985 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:49,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:50,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,049 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:50,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:50,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:50,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,115 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:13:50,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:13:50,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:13:50,204 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:50,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:13:50,238 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:13:53,127 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4299#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:13:53,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:13:53,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:13:53,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-19 07:13:53,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838011710] [2022-11-19 07:13:53,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:13:53,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-19 07:13:53,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:53,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-19 07:13:53,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 07:13:53,131 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:53,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:53,290 INFO L93 Difference]: Finished difference Result 258 states and 302 transitions. [2022-11-19 07:13:53,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-19 07:13:53,291 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-11-19 07:13:53,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:53,292 INFO L225 Difference]: With dead ends: 258 [2022-11-19 07:13:53,292 INFO L226 Difference]: Without dead ends: 154 [2022-11-19 07:13:53,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 306 SyntacticMatches, 44 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3620 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 07:13:53,294 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:53,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:13:53,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-19 07:13:53,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-11-19 07:13:53,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0718954248366013) internal successors, (164), 153 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2022-11-19 07:13:53,307 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 127 [2022-11-19 07:13:53,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:53,307 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2022-11-19 07:13:53,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:53,308 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2022-11-19 07:13:53,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-19 07:13:53,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:53,309 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:53,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:53,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:53,514 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:53,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:53,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1421957727, now seen corresponding path program 7 times [2022-11-19 07:13:53,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:53,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375529037] [2022-11-19 07:13:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:53,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-19 07:13:57,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:57,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375529037] [2022-11-19 07:13:57,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375529037] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:13:57,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87421675] [2022-11-19 07:13:57,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:13:57,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:57,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:57,191 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:57,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:13:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:57,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 1703 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-19 07:13:57,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-19 07:13:57,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-19 07:14:00,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87421675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:14:00,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1756481988] [2022-11-19 07:14:00,827 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:14:00,827 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:14:00,828 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:14:00,828 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:14:00,828 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:14:00,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:00,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:00,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:00,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:00,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:00,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:00,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:00,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:00,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:00,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:01,545 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-19 07:14:01,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-19 07:14:01,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:01,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:01,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:01,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:01,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:01,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:01,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:01,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:01,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:01,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:02,619 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-19 07:14:02,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-19 07:14:02,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:02,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:02,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:14:03,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:03,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:03,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:03,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:03,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:03,257 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:14:03,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 1020 treesize of output 1010 [2022-11-19 07:14:04,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:05,006 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:14:05,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:14:05,043 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:14:05,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:14:05,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:05,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:05,130 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:14:05,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-19 07:14:05,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:05,219 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:05,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:05,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:05,252 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:05,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:05,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:05,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:05,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:05,307 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:14:05,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:14:05,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:05,367 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:05,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:05,395 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:14:05,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:14:05,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:05,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:05,476 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:14:05,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:14:05,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:05,549 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:05,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:05,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:05,584 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:05,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:05,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:05,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:05,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:05,639 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:14:05,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:14:05,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:05,696 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:05,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:05,728 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:14:05,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:14:05,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:05,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:05,808 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:14:05,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:14:05,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:05,913 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:05,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:05,941 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:14:05,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:14:05,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:05,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:06,039 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:14:06,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-19 07:14:06,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:06,133 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:06,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:06,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:06,164 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:06,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:06,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:06,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:06,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:06,222 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:14:06,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:14:06,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:06,278 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:06,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:06,306 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:14:06,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:14:06,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:06,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:06,389 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:14:06,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:14:06,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:06,488 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:06,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:06,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:06,522 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:06,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:06,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:06,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:06,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:06,577 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:14:06,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:14:06,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:06,653 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:06,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:06,681 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:14:08,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6121#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:14:08,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:14:08,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:14:08,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-19 07:14:08,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949276736] [2022-11-19 07:14:08,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:14:08,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-19 07:14:08,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:08,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-19 07:14:08,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-19 07:14:08,294 INFO L87 Difference]: Start difference. First operand 154 states and 164 transitions. Second operand has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 100 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:08,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:08,591 INFO L93 Difference]: Finished difference Result 308 states and 377 transitions. [2022-11-19 07:14:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-19 07:14:08,592 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 100 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-19 07:14:08,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:08,593 INFO L225 Difference]: With dead ends: 308 [2022-11-19 07:14:08,593 INFO L226 Difference]: Without dead ends: 204 [2022-11-19 07:14:08,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 389 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-19 07:14:08,596 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:08,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:14:08,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-19 07:14:08,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-11-19 07:14:08,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0541871921182266) internal successors, (214), 203 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:08,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 214 transitions. [2022-11-19 07:14:08,610 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 214 transitions. Word has length 152 [2022-11-19 07:14:08,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:08,611 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 214 transitions. [2022-11-19 07:14:08,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 100 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:08,611 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 214 transitions. [2022-11-19 07:14:08,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-19 07:14:08,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:08,613 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:08,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:08,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:08,822 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:14:08,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:08,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1648874721, now seen corresponding path program 8 times [2022-11-19 07:14:08,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:08,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482117467] [2022-11-19 07:14:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:08,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5346 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-19 07:14:17,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:17,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482117467] [2022-11-19 07:14:17,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482117467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:17,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974114769] [2022-11-19 07:14:17,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:14:17,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:17,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:17,821 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:17,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:14:46,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:14:46,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:14:46,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:14:46,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5346 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5291 trivial. 0 not checked. [2022-11-19 07:14:47,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5346 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5291 trivial. 0 not checked. [2022-11-19 07:14:47,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974114769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:14:47,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1481919191] [2022-11-19 07:14:47,934 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:14:47,934 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:14:47,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:14:47,934 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:14:47,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:14:48,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:48,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:48,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:48,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:48,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:48,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:48,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:48,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:48,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:48,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:48,985 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-19 07:14:48,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-19 07:14:49,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:49,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:49,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:49,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:49,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:49,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:49,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:49,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:49,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:49,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:49,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 76 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 67 [2022-11-19 07:14:49,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:49,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:49,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:14:49,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:49,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:49,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:49,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:49,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:49,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:49,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:49,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:49,621 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:14:49,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 1040 treesize of output 1008 [2022-11-19 07:14:49,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:49,936 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:14:49,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:14:49,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:49,974 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:49,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:50,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:50,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,039 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:14:50,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:14:50,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,120 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:50,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:50,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,178 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:50,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:50,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:50,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,233 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:14:50,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:14:50,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,289 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:50,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:50,322 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:14:50,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:14:50,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,422 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:14:50,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-19 07:14:50,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,508 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:50,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:50,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,536 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:50,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:50,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:50,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,596 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:14:50,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:14:50,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,649 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:50,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:50,680 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:14:50,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:14:50,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,764 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:14:50,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:14:50,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,847 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:50,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:50,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,879 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:50,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:50,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:50,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:50,937 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:14:50,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:14:50,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:51,010 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:51,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:51,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:51,066 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:51,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:51,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:51,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:51,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:51,122 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:14:51,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:14:51,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:51,182 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:51,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:51,219 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:14:51,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:14:51,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:51,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:51,308 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:14:51,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:14:51,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:51,389 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:51,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:51,423 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:14:51,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:14:51,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:51,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:51,558 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:14:51,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-19 07:14:51,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:14:51,656 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:51,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:14:51,681 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:14:52,809 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8465#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:14:52,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:14:52,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:14:52,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-19 07:14:52,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290162253] [2022-11-19 07:14:52,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:14:52,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-19 07:14:52,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:52,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-19 07:14:52,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-19 07:14:52,815 INFO L87 Difference]: Start difference. First operand 204 states and 214 transitions. Second operand has 123 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 123 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:53,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:53,649 INFO L93 Difference]: Finished difference Result 417 states and 545 transitions. [2022-11-19 07:14:53,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-19 07:14:53,650 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 123 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2022-11-19 07:14:53,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:53,652 INFO L225 Difference]: With dead ends: 417 [2022-11-19 07:14:53,652 INFO L226 Difference]: Without dead ends: 313 [2022-11-19 07:14:53,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-19 07:14:53,657 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:53,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:14:53,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-19 07:14:53,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2022-11-19 07:14:53,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.0352564102564104) internal successors, (323), 312 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:53,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 323 transitions. [2022-11-19 07:14:53,675 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 323 transitions. Word has length 202 [2022-11-19 07:14:53,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:53,675 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 323 transitions. [2022-11-19 07:14:53,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 123 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:53,676 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 323 transitions. [2022-11-19 07:14:53,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-19 07:14:53,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:53,680 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:53,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:53,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:14:53,898 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:14:53,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:53,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1588214187, now seen corresponding path program 9 times [2022-11-19 07:14:53,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:53,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674951968] [2022-11-19 07:14:53,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:53,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:15:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-19 07:15:03,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:15:03,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674951968] [2022-11-19 07:15:03,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674951968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:15:03,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953960530] [2022-11-19 07:15:03,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:15:03,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:15:03,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:15:03,800 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:15:03,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:15:04,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:15:04,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:15:04,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 3326 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-19 07:15:04,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:15:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-19 07:15:05,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:15:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-19 07:15:17,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953960530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:15:17,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [421269446] [2022-11-19 07:15:17,231 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:15:17,231 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:15:17,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:15:17,232 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:15:17,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:15:17,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:17,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:17,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:17,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:17,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:17,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:17,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:17,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:17,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:17,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:17,923 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-19 07:15:17,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-19 07:15:18,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:18,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:18,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:18,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:18,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:18,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:18,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:18,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:18,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:18,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:18,998 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-19 07:15:18,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-19 07:15:19,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:19,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:19,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:15:19,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:19,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:19,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:19,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:19,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:19,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:19,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:19,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:19,616 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:15:19,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 1040 treesize of output 1008 [2022-11-19 07:15:19,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:19,920 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:15:19,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:15:19,956 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:15:19,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:15:19,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:19,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,041 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:15:20,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-19 07:15:20,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,115 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:15:20,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:15:20,150 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:15:20,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:15:20,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,250 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:15:20,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:15:20,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,342 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:15:20,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:15:20,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,376 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:15:20,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:15:20,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:20,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,428 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:15:20,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:15:20,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,554 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:15:20,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:15:20,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,611 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:15:20,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:15:20,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:20,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,664 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:15:20,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:15:20,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,718 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:15:20,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:15:20,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,751 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:15:20,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:15:20,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:20,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,808 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:15:20,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:15:20,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,865 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:15:20,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:15:20,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,895 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:15:20,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:15:20,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:20,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:20,952 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:15:20,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:15:21,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:21,031 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:15:21,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:15:21,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:21,086 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:15:21,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:15:21,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:21,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:21,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:21,139 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:15:21,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:15:21,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:21,198 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:15:21,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:15:21,231 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:15:21,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:15:21,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:21,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:21,316 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:15:21,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-19 07:15:21,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:21,436 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:15:21,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:15:21,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:21,470 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:15:21,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:15:21,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:21,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:21,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:21,536 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:15:21,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:15:21,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:15:21,614 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:15:21,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:15:21,638 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:15:34,180 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11979#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:15:34,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:15:34,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:15:34,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-19 07:15:34,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478792751] [2022-11-19 07:15:34,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:15:34,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-19 07:15:34,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:15:34,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-19 07:15:34,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-19 07:15:34,196 INFO L87 Difference]: Start difference. First operand 313 states and 323 transitions. Second operand has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 202 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:15:34,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:15:34,817 INFO L93 Difference]: Finished difference Result 626 states and 746 transitions. [2022-11-19 07:15:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-19 07:15:34,818 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 202 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2022-11-19 07:15:34,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:15:34,820 INFO L225 Difference]: With dead ends: 626 [2022-11-19 07:15:34,820 INFO L226 Difference]: Without dead ends: 414 [2022-11-19 07:15:34,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1032 GetRequests, 757 SyntacticMatches, 69 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22596 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-19 07:15:34,824 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:15:34,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:15:34,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-19 07:15:34,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2022-11-19 07:15:34,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.026634382566586) internal successors, (424), 413 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:15:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 424 transitions. [2022-11-19 07:15:34,842 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 424 transitions. Word has length 311 [2022-11-19 07:15:34,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:15:34,843 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 424 transitions. [2022-11-19 07:15:34,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 202 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:15:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 424 transitions. [2022-11-19 07:15:34,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2022-11-19 07:15:34,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:15:34,851 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:15:34,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:15:35,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:15:35,063 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:15:35,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:15:35,063 INFO L85 PathProgramCache]: Analyzing trace with hash -2072495007, now seen corresponding path program 10 times [2022-11-19 07:15:35,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:15:35,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586466048] [2022-11-19 07:15:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:15:35,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:15:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 22377 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-19 07:16:08,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:08,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586466048] [2022-11-19 07:16:08,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586466048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:08,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116224909] [2022-11-19 07:16:08,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:16:08,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:08,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:08,543 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:08,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:16:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:10,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 5043 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-19 07:16:10,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 22377 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-19 07:16:10,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:16:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 22377 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-19 07:16:58,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116224909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:16:58,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1673867660] [2022-11-19 07:16:58,746 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:16:58,746 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:16:58,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:16:58,747 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:16:58,747 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:16:58,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:58,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:58,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:58,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:58,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:58,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:58,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:58,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:58,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:58,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:59,448 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-19 07:16:59,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-19 07:16:59,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:59,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:59,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:59,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:59,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:59,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:59,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:59,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:59,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:16:59,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:00,508 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-19 07:17:00,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-19 07:17:00,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:00,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:00,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:17:01,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:01,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:01,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:01,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:01,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:01,135 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:17:01,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 1020 treesize of output 1010 [2022-11-19 07:17:02,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:02,871 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:17:02,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:17:02,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:02,906 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:17:02,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:17:02,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:02,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:02,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:02,962 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:17:02,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:17:03,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:03,038 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:17:03,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:17:03,091 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:17:03,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:17:03,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:03,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:03,194 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:17:03,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-19 07:17:03,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:03,274 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:17:03,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:17:03,305 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:17:03,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:17:03,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:03,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:03,400 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:17:03,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:17:03,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:03,465 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:17:03,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:17:03,495 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:17:03,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:17:03,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:03,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:03,576 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:17:03,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-19 07:17:03,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:03,651 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:17:03,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:17:03,683 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:17:03,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:17:03,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:03,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:03,771 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:17:03,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-19 07:17:03,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:03,843 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:17:03,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:17:03,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:03,877 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:17:03,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:17:03,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:03,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:03,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:03,929 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:17:03,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:17:03,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:04,008 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:17:04,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:17:04,059 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:17:04,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:17:04,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:04,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:04,159 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:17:04,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-19 07:17:04,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:04,240 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:17:04,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:17:04,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:04,273 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:17:04,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:17:04,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:04,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:04,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:04,327 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:17:04,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:17:04,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:04,411 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:17:04,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:17:04,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:04,466 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:17:04,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:17:04,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:04,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:04,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:04,521 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:17:04,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-19 07:17:04,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:17:04,602 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:17:04,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:17:04,630 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:17:06,392 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16921#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:17:06,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:17:06,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:06,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-19 07:17:06,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824587649] [2022-11-19 07:17:06,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:06,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-19 07:17:06,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:06,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-19 07:17:06,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-19 07:17:06,413 INFO L87 Difference]: Start difference. First operand 414 states and 424 transitions. Second operand has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 404 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:09,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:09,003 INFO L93 Difference]: Finished difference Result 828 states and 1049 transitions. [2022-11-19 07:17:09,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-19 07:17:09,004 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 404 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 412 [2022-11-19 07:17:09,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:09,007 INFO L225 Difference]: With dead ends: 828 [2022-11-19 07:17:09,007 INFO L226 Difference]: Without dead ends: 616 [2022-11-19 07:17:09,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1436 GetRequests, 1028 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 65.4s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-19 07:17:09,016 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:09,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:17:09,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-11-19 07:17:09,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2022-11-19 07:17:09,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 1.0178861788617886) internal successors, (626), 615 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:09,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 626 transitions. [2022-11-19 07:17:09,041 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 626 transitions. Word has length 412 [2022-11-19 07:17:09,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:09,042 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 626 transitions. [2022-11-19 07:17:09,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 404 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:09,043 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 626 transitions. [2022-11-19 07:17:09,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2022-11-19 07:17:09,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:09,059 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:09,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:09,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:17:09,274 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:09,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:09,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1846670687, now seen corresponding path program 11 times [2022-11-19 07:17:09,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:09,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547008609] [2022-11-19 07:17:09,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:09,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 83280 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-19 07:19:18,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:19:18,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547008609] [2022-11-19 07:19:18,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547008609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:19:18,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719251387] [2022-11-19 07:19:18,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:19:18,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:19:18,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:19:18,398 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:19:18,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98d978e-7cd6-454e-bb2f-07c12a7d84d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process